Quarter	Billions of US Dollars
1972-04-01	0.0250
1973-04-01	0.0200
1974-04-01	0.0613
1975-04-01	0.0350
1976-04-01	0.1093
1976-10-01	0.0377
1977-04-01	0.0675
1977-07-01	0.0603
1977-10-01	0.0880
1978-01-01	0.1397
1978-04-01	0.2331
1978-07-01	0.0507
1978-10-01	0.2923
1979-01-01	0.0738
1979-04-01	0.1190
1979-07-01	0.0250
1985-04-01	0.5000
1986-04-01	0.0907
1988-01-01	0.1522
1988-04-01	0.1289
1988-07-01	0.1459
1988-10-01	0.0787
1989-04-01	0.0811
1989-07-01	0.0794